期刊
JOURNAL OF MICROBIOLOGY
卷 50, 期 1, 页码 112-118出版社
MICROBIOLOGICAL SOCIETY KOREA
DOI: 10.1007/s12275-012-1597-4
关键词
Cmr1; DNA-binding protein; damaged DNA binding; WD40 repeats; UV-irradiation; Saccharomyces cerevisiae
类别
资金
- National Research Foundation of Korea [313-2008-2-C00666]
- Inha University
DNA metabolic processes such as DNA replication, recombination, and repair are fundamentally important for the maintenance of genome integrity and cell viability. Although a large number of proteins involved in these pathways have been extensively studied, many proteins still remain to be identified. In this study, we isolated DNA-binding proteins from Saccharomyces cerevisiae using DNA-cellulose columns. By analyzing the proteins using mass spectrometry, an un-characterized protein, Cmr1/YDL156W, was identified. Cmr1 showed sequence homology to human Damaged-DNA binding protein 2 in its C-terminal WD40 repeats. Consistent with this finding, the purified recombinant Cmr1 protein was found to be intrinsically associated with DNA-binding activity and exhibited higher affinity to UV-damaged DNA substrates. Chromatin isolation experiments revealed that Cmr1 localized in both the chromatin and supernatant fractions, and the level of Cmr1 in the chromatin fraction increased when yeast cells were irradiated with UV. These results suggest that Cmr1 may be involved in DNA-damage responses in yeast.
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